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JOHN L DOUGHTY ANI) HOR'ATIO B. BECKMAN, NEWBRG, NEW YORK.

Letters Patent No. 70,538, dated November 5, 1867.

IMPROVEMENT IN FEED-WATER HEATERS IOR STEAM-GENERATORS.

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TO ALL WI-IOM IT MAY CONCERN.:

Be it known that we, JonN W. Douonrr and HonATIo B. BECKMAN, of Newburg, in the county of Orange, and State of New York, have invented a new Apparatus for Purifying the Water for Steam-Boilers, and for eqnalizing the temperature throughout the boilers, so as to preserve the boilers fromthe eteet et' unequal expansion and contraction; and we do hereby declare that the following is afull, clear, and exact description thereof, reference being had to the accompanying drawing, and to the letters of reference marked thereon.

The n'ature of our invention consists in providing the boiler with a vertical tubular vessel, T T, the upper part of which, S, is connected. by 'a pipe, Q1, with the steam-space of the boiler'B, and another pipe, Q2, columnnicating with the boiler B below the water line near the bottom of the boiler. This second pipe Q2 projects a little over the water lint` L2, in the vessel T, by means of elbow Gr and pipe E, which latter is perforated on its top end, and the top opening covered or protected by an apron or a roof, F, so als not to allow the water, which is entering through apipc, I, on top of the vessel, to fall direct in the opening ot' pipe E. To the top cover K is connected the pipe I", through which the water passes from the hydrant, pump, or any other instrument to feed the boiler. The water enters directly into the steam-space S of the chamber T, strikes by falling down on the root` I?, and descends down towards the bottom part W along the sides, leaving the inner space around the inner pipe E for the displaced water to ascend and enter the pipe E, through the holes on top, and go into the boiler hy thc pipe Q2. The lower end W ot' the vessel T projects below the lower edge of the boiler, and being out-side of the furnace leaves the water there undisturbed, and all salts and earthy matter thrown into the vessel T, with the feed-water, will settle down quietly at the bottom of the vessel, from whence it can be blown off at any time by means of blow-oil` cock G3, and blow-ott` pipe P2.

This separation and precipitation of salts and earthy matters are effected as follows: The feed-water which may have passed through a heater before, and after passing a check-valve inthe pipe I, is met in t'he pipe I" by a rapid current of steam occasioned by a partial condensation of steam as it comes in contact with the feedwatcr, and being thrown into the steam-space S, absorbs caloricrapidly from the steam, so that the water instantly is brought to a state of vapor, and gives up in this state its impurities, which by their own gravity settle to the bottom of the well W. The purer water being specifically lighter than that which holds foreign matter, will remain near the surface, and as the water in the boilerl cvaporates, will pass through the pipe E into the boiler B, so as to keep the level L of the water in the boiler at the same height with the level L2 in the chamber T. l

By this device the boiler is not only kept comparatively free from sediment and incrustation, but by causing the Water, before coming in contact with the boiler, to attain through the medium of the steam in the boiler the same temperature as the water from which the steam is formed, a more complete equalization of temperature throughout the boiler is effected than would be obtained by any other means.

What we claim as our invention, and desire to secure by Letters Patent, is

The chamber T with pipe P1, in combination with the feed-pump or any other instrument of supply, well W. blow-off pipe I, steam-connecting pipe Q, water-communication pipe E G Q, with the cnp F and boiler-B, as Shown in the drawing, and for the purpose as set forth.

JOHN W. DOUGIITY. [1.. s]

IIORATIOB. BECKMAN. [1.. s]

Witnesses:

DARWIN W. Esneux), WALTER C. ANTHONY. 

